With 257,093 cases, Nigeria has been rated 5th country with the highest pollution and mortality deaths across the globe in one year.

Increasing pollution is said to be proving deadlier than war, natural disasters or smoking, having been responsible for at least 9 million premature deaths.

A new report published in the Lancet medical journal puts India at No1 with 2,515,518 (24.5 percent), China at No.2 with 1,838,251 (19.5 percent),followed by Pakistan with 311,189 deaths (21.9 percent).

Bangladesh is in the 4th position with 260,836 deaths (26.6 percent).

The report is based largely on 2015 data from the Global Burden of Disease.